"Select all" in Zoho writer app, iOS.

"Select all" in Zoho writer app, iOS.

I'm using the Zoho Writer app on my iPhone, and it's great. The only thing I seem to be missing is the option to "select all" text in a document.
This document is 17 pages long already, and I want to change the font of the entire thing, but can only lyrics select one word then drag the maker to the bottom of the screen, then scroll, then grab the marker and drag it again.

Surely there's a "select all" option?